Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

One Raw material failed assay test is there any chance for failing purity of that material ?

Mylan,

7 11934

What are the differences between GC and HPLC?

1 14384

Why do we need GC instead of HPLC? or Why do we need HPLC instead of GC?

4 11687

What is linearity in HPLC and how will you test?

1 18931

what is the difference between polarimeter lamp and ir lamp

2965

What is the difference of time between two consecutive injections in HPLC?

Nectar Lifesciences,

2 9819

what is difference between IR lamp and polarimeter lamp

Raks Pharma,

2 8739

Why dissolution test is not performed in all of the products

Biocon, SDD,

2040

why we need to do karl ficher fector ?

Reliance,

2 11337

Why we are use 0.005M Sulphuric acid, in control of absorbance performance test UV Spectrophotometer calibration

Cipla, Reddy Labs,

2 15119

How much sample concentration should i inject against diluted standard in related substances for drug product in hplc analysis

Apotex,

1 3741

how to prepare 25 ppm acetone. explian with formula

4 16291

why sucrose not used in polarimeter calibration?

Cipla,

2 9720

What is the diffeence between assay and uniformity of content

2 9029

why ur using toulene in hexane in u.v calibration?

Biological.e.limited, Cipla,

3 28484


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Un-Answered Questions { Analytical Chemistry }

How do we fix the sample concentaryion in hplc method development?

671


Difference between hlaf and rlaf

1658


How to decide assay range for non pharmacopeial API analysis by HPLC? Could you give me any reference for same e.g Guidelines or Paper publications?

2871


What is delay volume?

855


how will you do the prep for unstable componds?

1443






If vendor having more imp than monograph then how to proceed? and how to set spec?

340


In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?

1457


why does used dry caffien in HPLC calibration?

1570


why are measure gas flow " ml " in Gas chromatography

1158


which are the sizes of capsules?

409


how to select short coloum and long coloumn for new molecule

1821


Tell me about analytical method validation in QC

5551


What if impurity area in control sample coming more as compared to LOQ level of impurity ?

1148


How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?

2721


what is the difference between potentiometric titration and karl fischer titration?

2427